1 /*
2 Copyright (C) 2003 Together
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 This library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with this library; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19 package org.enhydra.xml;
20
21 import org.w3c.dom.DOMException;
22 import org.w3c.dom.Node;
23 import org.w3c.dom.CharacterData;
24
25 /***
26 * @author Tweety
27 *
28 * A class representing a node in a meta-data tree, which implements
29 * the <a href="../../../../api/org/w3c/dom/CharacterData.html">
30 *
31 * @version 1.0
32 */
33 public class CharacterDataImpl extends NodeImpl implements CharacterData {
34
35
36 /***
37 * Constructs an empty <code>CharacterDataImpl</code>.
38 */
39 public CharacterDataImpl() {
40 }
41
42 /***
43 * Constructs a <code>CharacterDataImpl</code> from the
44 * given node as <code>Node</code>.
45 *
46 * @param node , as a <code>Node</code>.
47 */
48 public CharacterDataImpl(Node node) {
49 super(node);
50 }
51
52
53 /***
54 * Returns node value.
55 *
56 * @return node value, as <code>String</code>.
57 *
58 * @see org.w3c.dom.CharacterData#getData().
59 * @throws DOMException
60 */
61 public String getData() throws DOMException {
62 return nodeValue;
63 }
64
65 /***
66 * Sets the new value of this node.
67 *
68 * @param data the new data
69 *
70 * @see org.w3c.dom.CharacterData#setData(String).
71 * @throws DOMException
72 */
73 public void setData(String data) throws DOMException {
74 nodeValue = data;
75 }
76
77
78 /***
79 * Returns the substring from the node's value.
80 *
81 * @param offset the begin index of the substring.
82 * @param count the number of characters.
83 *
84 * @return substring of the node's value.
85 *
86 * @see org.w3c.dom.CharacterData#substringData(int, int).
87 * @throws DOMException
88 */
89 public String substringData(int offset, int count) throws DOMException {
90 int length = nodeValue.length();
91 if (count < 0 || offset < 0 || offset > length - 1)
92 throw new DOMException(DOMException.INDEX_SIZE_ERR, "Index out of bounds");
93
94 int tailIndex = length;
95 if(offset + count < length)
96 tailIndex = offset + count;
97 return nodeValue.substring(offset, tailIndex);
98 }
99
100
101 /***
102 * Appends data to the node's value.
103 *
104 * @param arg the data to append to the node's value.
105 *
106 * @see org.w3c.dom.CharacterData#appendData(String).
107 */
108 public void appendData(String arg) {
109 nodeValue += arg;
110 }
111
112
113 /***
114 * Inserts substring into node's value string.
115 *
116 * @param offset the begin index of the substring.
117 * @param arg the <code>String</code> to insert.
118 *
119 * @see org.w3c.dom.CharacterData#insertData(int, String).
120 * @throws DOMException
121 */
122 public void insertData(int offset, String arg) throws DOMException {
123 try {
124 nodeValue = new StringBuffer(nodeValue).insert(offset, arg).toString();
125 } catch (StringIndexOutOfBoundsException e) {
126 throw new DOMException(DOMException.INDEX_SIZE_ERR, "Index out of bounds");
127 }
128 }
129
130
131 /***
132 * Deletes characters from the node's value string.
133 *
134 * @param offset the begin index of the substring.
135 * @param count the number of characters.
136 *
137 * @see org.w3c.dom.CharacterData#deleteData(int, int).
138 * @throws DOMException
139 */
140 public void deleteData(int offset, int count) throws DOMException {
141 int tailLength = nodeValue.length() - count - offset;
142 if(nodeValue.length() - count - offset < 0)
143 tailLength = 0;
144 try {
145 nodeValue = nodeValue.substring(0, offset) +
146 (tailLength > 0 ? nodeValue.substring(offset + count, offset + count + tailLength) : "");
147 } catch (StringIndexOutOfBoundsException e) {
148 throw new DOMException(DOMException.INDEX_SIZE_ERR, "Index out of bounds");
149 }
150 }
151
152
153 /***
154 * Replaces characters in the node's value string.
155 *
156 * @param offset the begin index of the substring.
157 * @param count the number of characters.
158 * @param arg the <code>String</code> to insert.
159 *
160 * @see org.w3c.dom.CharacterData#replaceData(int, int, String).
161 * @throws DOMException
162 */
163 public void replaceData(int offset, int count, String arg) throws DOMException {
164 deleteData(offset, count);
165 insertData(offset, arg);
166 }
167
168
169 /***
170 * Returns the namespace of the node.
171 *
172 * @return the namespace of the node.
173 *
174 * @see org.w3c.dom.Node#getNamespaceURI().
175 */
176 public String getNamespaceURI() {
177 return super.getNamespaceURI();
178 }
179
180
181 }
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